@Citric @fe7565 @PJ_Glasso a lot of a good info about mbed vs adafruit board firmwares and sleep mode.
I was able to find examples how to do timer-based interrupts for mbed firmware, but not for the Adafruit/Bluefruit one. Do you know if timer-based interrupts are supported/working on non-mbed firmware?
Also, is it possible to use timer-based interrupts to wake device using either mbed or Bluefruit firmware?